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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60bac0a553f8a54924c37b81f6aa6ea462ced8b7dbc7940f82490b9f4f2961d4' 
  AND token = 'X81WidUCJSTaZRQraZWC1xIInS4fCCFBla7C7lSiROk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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