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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '11d10aa3df61ef693c45f71a2f948aaacedd97ea849c8bc67cd41f9e09111944' 
  AND token = 'tJ9mN7ouaZX2kK7NNU7Ph8M6INgx6n/yA/ZnioSukOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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