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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d400e2a0e50275b8d3b67e26320a8dd917ee978ed225cd3f2ff12ae4f32c794' 
  AND token = 'oT6c75RaHHrtw/ez0G80UE1yMKmJJ5SVJbd/l7NzQbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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