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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e08914df5e53ae3d9023e22d5a8923ce5619f1705d0fdca5daf7c22963183f69' 
  AND token = '/0H71goK5wcEXGXXA0+mksE/pbXdTeOwUSZ+sNJhOaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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