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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd445e0370270cf70c475ae9ff854f046ef65a0664aa28ef73ea83541b2f23d94' 
  AND token = 'ZBwNKqWJHCMTx2CDDfCSXwWftPQNw/CD2/Nf8bFbRP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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