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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '539be991d6e0ac86433883c4e77b5aef0bc3b46f8d3d792638efd18b932c812b' 
  AND token = 'LLT0yVZAWJgsZSQeUwd7cP66Jwn1N87SHIof1gfwvNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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