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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9bfbb9e763901db52e8f84813f552fd940ea7d338fc31ef538dc0d9fc25b5be1' 
  AND token = 'eojfGZ8eA2793zYkyqqIkILkD2T3ZYn8R6/+9Sj6VEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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