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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a2afaf60a2c1d70d056af0494bfcefb970e0261ecbd0c576a563ee8757f5bfd5' 
  AND token = '4YCZZIIT8hC3LnopW/DmuWuTVg/lWr6eK63Dh0fgRV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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