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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82957b0bc37d26ab34ec40e2270f1464d68265afa8c10c84d9a7272a5c2c61fb' 
  AND token = 'k1X75kW95k0gcEYhVnERhk4wXAGqHR5QIMEnk7OY2CU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}