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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22ee6bfa2a23aefc21d33a0daa787aa35d93ee481bcfda61314a325ebbcf204d' 
  AND token = 'oPKfihG5QW3ytSqs/iIpPrQt0U3FN8SMYu90DnDaq4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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