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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '962e95bac075a925df67e0caaffb366d0bc85f7bc9af4b792e35c0b4511534dd' 
  AND token = 'mZRNT7j1Hrn0LA2bTV4q0z4emgCyJxbbXd8X68Negr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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