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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '179c135a8e55e2282db7f6484fd320573149c53641de741bce11349decb569bb' 
  AND token = 'Ap7dPf+MkZ9/lbMmWCOvipcmCAq1U4p967OhlhoahdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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