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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '101330b057d180848208513f9820007eb674921015a79a17e47ab63c162efc53' 
  AND token = 'Arx8D02Z5s2Q/ac9vPSFUltu47zRQaCz2TTJ9aMWA80=' 
  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"
    }
  }
}