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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0ec22f04c2469c1118cd6745844f11b3fffabdc2c091a7c20e0af7fb41e80a5' 
  AND token = 'ig2qJulWeAvv8LmcVwmd3smj9l6NjlzHCW9IcOcDO9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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