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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bac90bbc00fff2e6a8f06e7dd707003fc0cc4e3dde26fedbca4fa274121116a' 
  AND token = 'hpRc36R8sb6UqD+IzR22dirnowxR6gKFCWRit8n7T/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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