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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbaee897a3cd87492a2a8e1e5cc01f3a6a4725bac5ed5d78a1d35390feb9ae9c' 
  AND token = 'a0KFsOFOtt9MP3/cMBvtlJzSwnyasuWN/KTOm7R6nFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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