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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1582e6c35245c9338ae22c502403d270de7fe87c949f2d743fa270fb6f5163dd' 
  AND token = 'Z9TkO2q+IsHqw/lNd1sK2uKXilEu7DwnDs493n6YeZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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