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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41022331032fb74ae888298cb3a69a324ae37fdb7b62b51d9795b1f52c354ef1' 
  AND token = 'ddFtiZC8AzKBb5pcWJ2Or0yng1L5SvQC9oeYAkwoNUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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