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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '601406b817e837e2ec9d289defb18fb8356846fe5838e35b6a289fd7f3df6ca1' 
  AND token = 'kr7n63LTq1fFQD02L3kK47gSZQ1Mpp2ic6QKiqkFUYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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