Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceabecb3e3cab7ac97694d850ef80788a1c94ffee45f1504db769f3d26ec0c39' 
  AND token = '+vADTLigNmfF9ppOzkQEx0S9eSboCVJnb+c/fhKbZsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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