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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa057b6c02f94859e9316cafee51c4e58ccf9ce554fce5190978f6bd4651f93d' 
  AND token = '62l8cuDJKXMi0u8HIY3bzDF1/6p4ey0fb/vm3hJO/YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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