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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a4bea0b6849cc428a6b2a97a2e773241e80de82b40209c4708f957ee53044df' 
  AND token = 'zumz3OGcpGiGDVECTc/tuYmubY17k+6JC2O+7IJ3k6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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