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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '22f9c569ae75be34623ee98c279b9297db04af616a4c8d24f84167d2183f8c33' 
  AND token = 'bwXZuA1xdlk6U3HknW9Ugxo8478Hnjlm76vt7Mt5Wyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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