Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba3fcf77fbff7dfde58fd01bf2c2cfbc3e4c346de22195b20e59a958aee5e05' 
  AND token = 'w88HQVAozYSdbxW03d6Dbl/cUpR5lQMvzhqwQZsnazQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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