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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77018d80b14a143eb7e9f30ded1fd5605731304b1a29a39acd7d8069f4140568' 
  AND token = 'W59IA4IKPFvpErX2gMiuieuCDT6X50+4Cr2DK/8I3+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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