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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07b5591f755d7dc49ece935e62998ff3178e24ce0211bf36b61a88cb9532bf2b' 
  AND token = 'DY/ba22pFmn5Znpw4ptBSTwhsgf32zeRkrV8ubdohbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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