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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8f65dbfe778c3c13c1f9b1ea15538b20bfa9ec29f2df2e9e406760af5c56e3e' 
  AND token = 'Z2dKqFCBMj9KxWlFLgauATEYeaFx6TXcIMblZkHO64E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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