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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad85bf6026949a1a741dd224c23b9af88a25ce1b7bcb98e36f43182df132315f' 
  AND token = '/nOFXW8UcvRsx3xmL49HH/U74USv7cG56XIch7s2ayE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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