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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccd9a27de5ea3f9dc28819524b2bf5c9904b1780d647a84ac8ddabf4d02cb097' 
  AND token = 'jIPd1gS6QucJEm1zrSoYd1D/bud2gwCt5HfUTqNRP08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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