Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39f5cfc70bf09925b73f16ac771abc3b0be4107384cea7ce7d9a2cb6067f241e' 
  AND token = 'vSXB+Wr6D6RA9fBFHVcAhKddW/lZr3PegH3azoXSP14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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