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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3d5d560550033f91b0a9fb16c2049e0e14ff5eabe6723c369e5d18206ff5f43' 
  AND token = 'oh7qB0SjaYvEDjEEpOyiHmxOKlHqdoVjXD1ArO8XvMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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