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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8940118382210cea130a1c47d08d3042e4c5a241dd262277f3d7f152372e409f' 
  AND token = '9AnG4sDVkCneXCXOQ/4r9tEyXYdLbB/T4ds9KigoFJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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