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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e44f81af868a58772ea419b8ae33c4fde98d216d0a812d20129f105b9601ee9' 
  AND token = '2q2SPuvaxdDqJ7G5dsM8W4Bqd1aSAAVBSJXaEDzg1yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}