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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '010591793528de733a9d660261763480b6aef4b83b1ba27206a9782fbbce814f' 
  AND token = 'KePanol/kveeTcpm1HZV8VWgGCdD46YipfNQbGMT8Cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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