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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b3b4d2ac1cc157eff6e615b3259dbbcdf23f0bfbaaea78c35927b793365e60c' 
  AND token = 'NARyJPn1xd+O0YNqlU4sCOCiKEEXmUqfbgV71AekVP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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