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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f01faeec58168921b46bbf0ba581f3fbe065bcee9aec2a5f332842646f739ed7' 
  AND token = 'H2uKLGsw39tyBZm75XemUX4Ht8e1CCyOAKkl5MsJLek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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