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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd86ba395db441629bdf04e65e2cdff5704caacfca6933d11c5f8432d905ef963' 
  AND token = 'S/bRe7dAUjssQHE3Gr+eStp59jGHy0VT6YY+iSGVDTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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