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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72f65c61f616d46ee5fd9085edcac687286498c71b737fe0c965a059ca3237e1' 
  AND token = 'B50RMD7/WFoe8AaKXPo/Qo07C4nx+0ITyWaC7iIau5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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