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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7b7f906cf8d7c1d3f7b7aa1d1f02e5192c8acb514abf82990d10aa40b5b1d6a' 
  AND token = 'fzG2mBbW/n58intTudLAelgjviLWngdfplQllxeAeEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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