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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07ed3287c15fe76a7ed2612a5a9425d252b12ae25910b2debb5e4ea7a12379a9' 
  AND token = 'QBfp7ho02zH3NtK04fWrRoUu/GRb/QIfpwU4y/TC08M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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