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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '469ab012538c303b25d9e5f71f0b7453469aaf7ab00e14c2c83a362e2ccbf162' 
  AND token = '+hJH8w6I1g+Dbbikt/QWvkPOJr5ZbXJER25PjgznPwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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