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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aedf2533cfcd0cd2632b1cf31a00500cc6e5c3bdc18eacaad68ce39946adcb1d' 
  AND token = 'G+pieKdWf442KS0FK6zkFltbihOQJCjeDLl83kVY04c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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