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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08ae45790e19019130b49ce746f5e9d9b1ca48b370b570df71058182b3834e94' 
  AND token = 'fSOjqC2C4m0y5BNxcNGVrJv+Yy7N5f7yXbDK+IDKZIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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