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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a043fa1133ac69bbd8beec6fe147112c3803aad0f3ea96e79fe95b451d5dfc69' 
  AND token = 'ADYd8Z4p0O2SU7VKZTP+5zjfQyHS3u/C+y3H0FsiwGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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