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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd1f10fb7f38f3c4b0879beaba18fa88ca27f8b5cd980fe66bd13480f12a32ae' 
  AND token = '8qR/DTytaUMIyyerMUbNd4ppu6fjwTyJX9zUExB6M8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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