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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6dfe5ae0725903e7453ae1b7276d0ed0d3af34f7139104bdc06e70be9fb6e45' 
  AND token = 'tK3TBB4t0Ejpda1h5uC0bHv5KFdu+sX/QX+cw23MXP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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