Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0352f4494e3298698a0647b317014975da7e2cffd4b2e6f2dbd2e8f24082e971' 
  AND token = 'crQ/gUlch1Rh8RkxDhjRuju7ejoT8cKdfBqbIQf9eDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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