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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07d7b8824ef9d9530d409480ed7752ce5734e05f2788ce4ff113413278c9e249' 
  AND token = 'O/F4D99D07RzA6rVcesr4RY6LF4tvLQVzbU6vCwtNJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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