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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '103d40c7346f5b9ccf237a5794d270eb4e1c83e95ac178b1d4c2f85f28e99341' 
  AND token = 'aEOGFI3EUoiGTSXjvXf9L/og++l7Qts4dGgR/0cvM8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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