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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b9d6318a24d7abd3246632e5906bda7fe37087cc5ecffb50834c5b38a887486b' 
  AND token = 'lNeDOisfDyd8pz7gTtwikJ05K1dApt6IMxeRRU+wIjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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