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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '559b4c31b6e9a18bfeeab0ddba64b43ecbaaec9132b73a7f396678a015b0291e' 
  AND token = 'PIv2Eu1aBzfx+TUOv+1Ge1hBwDu8fZPyj9G3oMCGQ6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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