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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60cc7aca030b905f3d774f1f9f0d498acaba4bfc491c0464fd71b4fb327a2fdf' 
  AND token = 'yBUQ4lwFGzg5M7lSCbrIOL6XeDrRDyx6OJb7L9vLEB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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