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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '187db8d2d50b21a18e3c977d0ef12d743a82ceff049f6c1f59a436a9e49db2f7' 
  AND token = 'E+ARf5n1/zftZc9IIZSqAZZLX5gEjyERf3Wo/+oBM00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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